I agree completely with these posts - it is silly, stupid, and quite possibly dangerous to deliberately hassle snakes. Nor is it necessary. In all my snake encounters, I went in one direction and the snake went in another. No problem.

Incidentally, are there trails in the Sierra San Pedro Martir? It has been a while, but one of my most memorable trips was a climb of Picacho del Diablo from the east side. Nothing remotely resembling a trail at all during the entire trip. Didn't see any rattlesnakes, either. Best wilderness trip ever.